function showDiv(obj) {
        hideDiv();
        document.getElementById(obj).style.visibility = "visible";
    }
    
    function hideDiv() {
        document.getElementById("hotel").style.visibility = "hidden";
        document.getElementById("preise").style.visibility = "hidden";
        document.getElementById("multimedia").style.visibility = "hidden";
        document.getElementById("wellness").style.visibility = "hidden";
    }